AWS Single Sign-On is a cloud-based service that simplifies managing SSO access to AWS accounts and business applications. You can control SSO access and user permissions across all your AWS accounts in AWS Organizations. You can also administer access to popular business applications and custom applications that support Security Assertion Markup Language (SAML) 2.0. In addition, AWS SSO offers a user portal where your users can find all their assigned AWS accounts, business applications, and custom applications in one place.